High permeability soft soil grouting reinforcement composite material and preparation method thereof

Abstract

The present application relates to soft soil reinforcement technical field, specifically to a kind of high permeability soft soil grouting reinforcement composite material and preparation method thereof, by mass fraction, including the following raw materials: hydraulically setting cementitious composite material 80~120 parts, inorganic water-consuming powder 0~1.5 parts, surfactant 0.1~1 parts, early strength surfactant 0~0.5 parts and water 20~40 parts.The material of the present application enters soft soil, by the penetration and water consumption of inorganic water-consuming powder and hydraulically setting cementitious composite material, can significantly reduce the moisture content in soft soil, and can form dendritic support structure in soft soil, play a significant reinforcement effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soft soil reinforcement, in particular to a high-permeability soft soil grouting reinforcement composite material and a preparation method thereof. BACKGROUND

[0002] Soft soil areas have the disadvantages of uneven stratum, abundant underground water, weak foundation bearing capacity, large deformation, and the like. The stratum is prone to deformation and settlement. Whether it is a ground structure or an underground structure, there is a great risk in engineering operations in soft soil areas. Solidifying soft soil to improve the strength and stability of the stratum is a common solution.

[0003] Existing grouting materials cannot be applied to soft soil. Due to the characteristics of small pore size, high water content, tight combination of soil particles and pore water, unknown underground water replenishment, and the like, soft soil has poor injectability and poor mechanical property reinforcement effect after grouting. Traditional grouting methods insert a grouting needle or a steel pull flower pipe into the soil, and inject cement-based grout, epoxy resin grout, or water glass double-liquid grout through a grouting machine to play a reinforcing role. Existing cement-based grout uses ordinary Portland cement. The particles of ordinary Portland cement are large and difficult to inject into the small pore diameter of soft soil. The water-cement ratio of cement-based grout is usually 1:1. After the cement completely reacts, there is still excess water. Although epoxy resin or water glass double-liquid grout has good permeability, the material itself does not react with water and does not consume the water in soft soil. This leads to the fact that existing grouting materials do not have obvious reinforcement effect on soft soil with high water content, and even excessive grouting can cause ground uplift.

[0004] Existing soft soil reinforcement technology cannot be applied to deep-buried urban tunnels. Existing ground reinforcement in soft soil areas usually adopts high-pressure splitting grouting or rotary mixing solidification. These two reinforcement methods have great difficulty in surface construction and have high requirements for the surface construction environment. They are difficult to operate when passing through urban buildings. For shield tunnels with large burial depth, surface reinforcement machinery often cannot reach the corresponding depth. When the equipment is used in underground structures, the underground structures cannot withstand the high pressure and the reaction force caused by rotation.

[0005] In summary, the existing grouting materials and soft soil reinforcement methods have poor applicability. There is an urgent need for a high-permeability self-water-consuming soft soil grouting reinforcement composite material. In view of this problem, an improvement measure is proposed to provide a reinforcement material that can be used for reinforcement in soft soil areas, aiming to achieve the purpose of low disturbance and convenient soft soil reinforcement construction through the present application. SUMMARY

[0006] The present application aims to provide a high-permeability soft soil grouting reinforcement composite material and a preparation method thereof, solving the technical problem of poor reinforcement effect of existing reinforcement materials on soft soil with high water content.

[0007] This invention discloses a high-permeability soft soil grouting reinforcement composite material, which, by mass parts, comprises the following raw materials: 80-120 parts of hydraulic cementitious composite material, 0-1.5 parts of inorganic water-consuming powder, 0.1-1 parts of surfactant, 0-0.5 parts of early-strength surfactant, and 20-40 parts of water.

[0008] Furthermore, the hydraulic cementitious composite material is one or more of silicate cement, aluminate cement, sulfoaluminate cement, fly ash cement, silica fume cement, and mineral powder cement.

[0009] Furthermore, the fineness of the hydraulic cementitious composite material is above 800 mesh.

[0010] Furthermore, the inorganic water-consuming powder is one or more of calcium oxide, calcium chloride, sodium sulfate, and magnesium chloride.

[0011] Furthermore, the surfactant is a lignin sulfonate, a polycyclic aromatic salt, a water-soluble resin sulfonate, a naphthalene-based surfactant, an aliphatic surfactant, an amino surfactant, or a polycarboxylic acid surfactant.

[0012] Furthermore, the early-strength surfactant is one or more of melamine-based, modified melamine-based, anthracene-based, or wash oil-based surfactants.

[0013] A method for preparing a high-permeability soft soil grouting reinforcement composite material includes the following steps:

[0014] According to the weight proportions, first weigh the hydraulic cementitious composite material, inorganic water-consuming powder, surfactant, and early-strength surfactant. Use a mortar mixer to mix the raw materials and stir at a low speed of 100-150 rpm for 60-300 seconds to ensure that the solid components are evenly mixed, thus obtaining material A. Weigh water according to the weight proportions and add it to the evenly mixed solid materials all at once. Use a mortar mixer to stir at a low speed of 100-150 rpm for 60-300 seconds, and then stir at a high speed of 200-300 rpm for 90-300 seconds to obtain material B. Material B is the reinforced composite material.

[0015] A method for using a high-permeability soft soil grouting reinforcement composite material includes the following steps:

[0016] Add the prepared material B to the mortar injection machine, use a hose to circulate the grout inside the injection machine, after circulating for 30 seconds, control the injection pressure and start the injection operation.

[0017] Furthermore, it includes the following steps:

[0018] Add the prepared material B to a rotary mixer or high-pressure grouting machine, and then insert it into the soft soil layer from the surface. Start the rotary mixer or high-pressure grouting machine to begin the soft soil foundation reinforcement operation.

[0019] Furthermore, to address the issue of soft soil materials with higher water content and accelerate the onset time of the high-permeability soft soil grouting reinforcement composite material, an organic water-consuming material was added to material B to prepare a high-permeability soft soil grouting rapid reinforcement composite material. The raw materials, by weight, include: 80–120 parts of hydraulic cementitious composite material, 0.4–1.4 parts of inorganic water-consuming powder, 0.1–1 part of surfactant, 0–0.5 parts of early-strength surfactant, 0–1.6 parts of organic water-consuming material, and 20–40 parts of water.

[0020] Furthermore, the organic water-consuming material comprises, by mass parts, the following raw materials: 0-0.8 parts of NCO-R, 0-0.8 parts of RX·OH, 0-0.8 parts of (—R—O—R—) and 0-0.1 parts of catalyst.

[0021] Further, NCO-R is one or more of toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), hexamethylene diisocyanate (HDI), or lysine diisocyanate (LDI); RX·OH is one or more of trimethylolpropane, neopentyl glycol, ethylene glycol, or 1,3-butanediol; (—R—O—R—) is one or more of polypropylene glycol, polytetrahydrofuran glycol, or tetrahydrofuran-propylene oxide copolydiol; and the catalyst is one or more of triethylamine, diethylethanolamine, N-methylmorpholine, N-ethylmorpholine, N-methylpyrrolidine, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin dioleate, or dioctyltin diacetate.

[0022] A method for preparing a high-permeability soft soil grouting rapid reinforcement composite material includes the following steps:

[0023] Weigh out the organic water-consuming material by weight, stir at low speed for 10-60 seconds to obtain material C. Add material C to material B and stir with a mixer for 30 seconds to mix material C and material B evenly. Add catalyst and stir for another 30 seconds to obtain material D. Material D is the high-permeability soft soil grouting rapid reinforcement composite material.

[0024] A method for using a high-permeability soft soil grouting rapid reinforcement composite material includes the following steps:

[0025] Add the prepared material B to the mortar grouting machine, and use a hose to circulate the grout within the machine. Slowly add material C, and circulate for 30 seconds to ensure that material B and material C are evenly mixed. Then add the catalyst, turn on the grouting machine, and circulate the grout within the machine for 30 seconds to ensure that the catalyst and grout are evenly mixed, thus preparing material D. Turn on the rotary mixer or high-pressure grouting machine to begin the soft soil foundation reinforcement work.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The water-cement ratio of the soft soil grouting reinforcement material in this invention is lower than 0.35, belonging to a low water-cement ratio cement-based system. The material has high strength after curing, and during hydration, it spontaneously and rapidly consumes free water in the soft soil, reducing the soil's moisture content and increasing its strength. The ultrafine cement used has a particle size of approximately 0.2 micrometers, with a maximum particle size not exceeding 20 micrometers. The grout made from ultrafine cement has excellent groutability, penetrating fine sand-silt mixed layers, silt layers, and silt layers that are generally considered impenetrable by cement particles. The specific surface area of ​​ultrafine cement is 10-20 times higher than that of ordinary cement. This allows for faster and more complete hydration, thereby improving the strength and durability of the grout. The hydration products of ultrafine cement are mainly hydrated calcium silicate gel (CSH) and calcium hydroxide crystals (Ca(OH)2). These hydration products fill the pores of the soil, increasing its compressive and shear strength.

[0028] 2. The addition of inorganic water-consuming powder in this invention allows it to be incorporated into grouting materials in soft soil. During the grouting process, by consuming the water in the grouting material, the moisture content of the grouting material is reduced, the osmotic pressure of the grouting material is increased, and the matrix suction of the grouting material to excess water in the soft soil is increased, causing water in the soft soil to migrate into the grouting material, thereby reducing the moisture content of the soft soil. At the same time, the inorganic water-consuming material can generate microstructure fillers after reacting with water, increasing the overall strength and durability of the hardened grouting material, improving the shrinkage performance of cement-based grouting materials, offsetting the shrinkage caused by cement hydration, improving the bond strength between cement stone and soil, and increasing the integrity of the soil.

[0029] 3. Surfactants are white, powdery polymeric compounds that can form strong electrostatic repulsion with calcium ions on the surface of cement or soil particles, and also provide steric hindrance, effectively reducing the thickness of the adsorbed water layer on the surface of soil particles and improving the permeability of soft soil. They effectively disperse cement, reduce the viscosity and rheological properties of cement slurry, maintain the high fluidity of low-water-ratio cement slurry, extend the working time of cement slurry, facilitate construction operations, and also reduce fluidity loss of cement slurry, ensuring the uniformity and stability of the cement slurry.

[0030] 4. Early-strength surfactants can form strong coordination bonds with calcium ions on the surface of soil and cement particles, further releasing bound water and improving the injectability of soft soil. Early-strength surfactants can also accelerate the hydration reaction of cement grout, promote the solidification of grouting materials, and prevent grout loss.

[0031] 5. The highly permeable grouting and rapid reinforcement composite material for soft soil with higher water content incorporates organic water-consuming materials into cement-based materials. Because these organic water-consuming materials are synthesized from small organic molecules with low molecular weight, they can easily pass through the gaps in soft soil, improving the permeability of the grouting material. Small molecules undergo condensation reactions to form polymers, consuming water and generating carbon dioxide gas. The condensation reaction of the organic water-consuming materials promotes the hydration reaction of cement, accelerating the hydration rate and generating more hydration products. This fills the pores of the cement, altering the composition and proportion of cement hydration products, increasing CSH gel while reducing the content of Ca(OH)2, AFt, and AFm. The generated carbon dioxide reacts with the calcium hydroxide produced during cement hydration to form calcium carbonate, providing nucleation sites for the cement hydration reaction, promoting the formation of CSH gel, and consuming the hydration reaction products, further accelerating cement hydration.

[0032] 6. After infiltrating into soft soil, the organic water-consuming material, under the action of a catalyst, reacts before the cement-based material, rapidly expanding to form a porous polymer. This foaming process consumes free water in the soft soil, creating voids and providing infiltration channels. The generated polymer also supports these voids, preventing soil subsidence and providing channels for cement slurry infiltration. The generated carbon dioxide accelerates the hydration of low water-cement ratio cement, further accelerating the spontaneous and rapid consumption of free water in the soft soil by the cement-based material. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a rendering of Embodiment 1 of the present invention.

[0035] Figure 2 This is a diagram illustrating the effect of using soft soil reinforcement materials in Comparative Example 5. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Example 1

[0038] This embodiment discloses a high-permeability soft soil grouting reinforcement composite material, which, by mass parts, includes the following raw materials: 100 parts of ultrafine silicate cement, 2.8 parts of magnesium chloride, 1 part of naphthalene-based water-reducing agent, 0.3 parts of anthracene-based surfactant, and 0.35 parts of water.

[0039] The preparation method includes the following steps: according to the weight parts, first weigh the hydraulic cementitious composite material, inorganic water-consuming powder, surfactant, and early-strength surfactant, use a mortar mixer to mix the raw materials and stir at low speed for 90 seconds to make the solid components uniformly mixed to obtain material A, weigh water according to the weight parts, add it to the uniformly mixed solid materials at one time, use a mortar mixer to stir at low speed for 200 seconds, and then stir at high speed for 250 seconds to obtain material B.

[0040] Add the prepared material B to the mortar injection machine, use a hose to circulate the grout inside the injection machine, after circulating for 30 seconds, control the injection pressure and start the injection operation.

[0041] The material in this embodiment remains injectable within 30 minutes, and the retained sample hardens within 1 hour.

[0042] Four hours after grouting, soil samples were taken to test their moisture content and penetration, and the morphology of the reinforcement material in the soft soil was observed.

[0043] The soil reinforced by the material of this invention has a penetration of 15cm and a moisture content of 25.7%, while the original soil sample has a penetration of 22.5cm and a moisture content of 35.8%.

[0044] Example 2

[0045] In this embodiment, as a preferred embodiment of the present invention, a high-permeability soft soil grouting reinforcement composite material comprises, by weight, the following raw materials: 95 parts of ultrafine silicate cement, 1 part of calcium oxide, 0.3 parts of melamine, 0.6 parts of toluene diisocyanate (TDI), 0.4 parts of ethylene glycol, 0.3 parts of tetrahydrofuran-propylene oxide copolymer glycol, 0.05 parts of diethylethanolamine, and 32 parts of water.

[0046] Its preparation method includes the following steps:

[0047] According to weight parts, first weigh the hydraulic cementitious composite material, inorganic water-consuming powder, and early-strength surfactant. Use a mortar mixer to mix the raw materials and stir at low speed for 90 seconds to ensure uniform mixing of all solid components, thus obtaining material C. Weigh water according to weight parts and add it to material C all at once. Use a mortar mixer to stir at low speed for 200 seconds, then stir at high speed for 250 seconds, thus obtaining material D. Weigh NCO-R, RX·OH, and (—R—O—R—) according to weight parts, and stir at low speed for 30 seconds using a dedicated mixing device to obtain material E.

[0048] Material D was added to a mortar grouting machine, and the grout was circulated within the machine using a hose. Material E was slowly added, and the mixture was circulated for 30 seconds to ensure that materials D and E were evenly mixed. A catalyst was then added, and the grouting machine was turned on, allowing the grout to circulate for another 30 seconds to ensure that the catalyst was evenly mixed with the grout. The grouting pressure was then controlled, and the grouting operation began. The resulting material hardened 180 seconds after grouting. A soil sample was taken 4 hours later, and its penetration was measured to be 17.2 cm, with a moisture content of 26.7%. This embodiment demonstrates that soft soil can be reinforced in a short time with good results.

[0049] Comparative Example 1

[0050] In this embodiment, which serves as a comparative example of the present invention, the following materials were used: 1. Composite ordinary silicate cement (water-cement ratio 0.5); 2. Naphthalene-based high-performance water-reducing agent; 3. Polyacrylamide; 4. Sodium hydroxide; 5. Polyacrylate (polyacrylate preparation ratio A:B:C = 8.3:1.0:0.7); 6. Water glass; 7. Trisodium citrate; 8. Lithium carbonate; 9. Calcium oxide; 10. Anhydrous calcium chloride; 11. Triethanolamine; 12. Water.

[0051] The above materials were sequentially injected into soft soil with the same moisture content and chemical composition as the experimental group. The penetration and moisture content of materials 1-6 were as follows: (1) 20.7 cm, 35.5%; (2) 22.8 cm, 36.2%; (3) 22.0 cm, 35.8%; (4) 22.5 cm, 35.8%; (5) 21.3 cm, 35.7%; (6) 21.9 cm, 34.9%; (7) 22.0 cm, 35.1%; (8) 22.6 cm, 35.3%; (9) 19.3 cm, 30.2%; (10) 18.6 cm, 28.9%; (11) 22.5 cm, 34.0%; (12) 22.7 cm, 38%. The original soil sample had a penetration of 22.5 cm and a moisture content of 35.8%.

[0052] Materials 2-12 mentioned above are among the raw materials used in this invention: surfactant, early-strength surfactant, organic water-consuming material, inorganic water-consuming material, and mixing water. Individual components of these materials have no reinforcing effect, and poor permeability was observed in the tests. Material 1 is a cement-based material with a high water-cement ratio system, exhibiting some reinforcing effect. However, due to the absence of inorganic water-consuming powder and surfactant, the slurry has poor injectability and permeability, lacks self-consumable water properties, and the moisture content of the soft soil remains almost unchanged.

[0053] Comparative Example 2

[0054] In this embodiment, as a comparative example of the present invention, the ratio of ultrafine cement:water:early-strength surfactant used was 1:1:0.0081 by weight. Its distinguishing feature from the present invention is that the water-cement ratio is 1.0, and no inorganic water-consuming powder or multiple surfactants are added. The material was injected into a soft soil sample using a grouting machine. The material could not be injected into the soil through the grouting machine. The grout overflowed from the soft soil within 2 seconds. After hardening for 48 hours, soil samples were taken from the reinforced area, and the penetration was tested to be 22.0 cm with a moisture content of 35.9%, showing no reinforcement effect. This is because the water-cement ratio of the control example was greater than the amount of water required for complete cement hydration, and no multiple surfactants or inorganic water-consuming powder were added. The material had poor permeability to soft soil and no self-consuming water properties, resulting in poor reinforcement of soft soil.

[0055] Comparative Example 3

[0056] In this embodiment, serving as a comparative example of the present invention, the ratio by weight of ultrafine cement: calcium oxide: polycarboxylate superplasticizer: water is 100:1:3:30. Its distinguishing feature from the present invention is the absence of an early-strength surfactant and organic water-consuming powder. The comparative example had a final setting time of 300 min, no hardening after 1 hour, and the soft soil was removed after 4 hours, with a penetration of 22.6 cm and a moisture content of 35.9%. This is because the absence of an early-strength surfactant resulted in a longer final setting time for the grouting material and a poorer reinforcement effect.

[0057] Comparative Example 4

[0058] Furthermore, following the above usage method, a comparative test was conducted using existing traditional grouting reinforcement materials: water glass-cement dual-liquid grouting materials.

[0059] The water glass-cement two-component grouting material lost its injectability within 10 minutes. Soil samples were taken 4 hours after grouting to test its moisture content and penetration, and the morphology of the reinforcing material in the soft soil was observed.

[0060] After soil reinforcement with water glass-cement dual-component grouting material, the penetration depth was 22.7 cm and the moisture content was 36.4%, while the penetration depth of the original soil sample was 22.5 cm and the moisture content was 35.8%. This is because the water glass-cement dual-component grouting material cannot penetrate soft soil and can only enter the soft soil by squeezing and displacing it, resulting in little change in the moisture content of the soft soil. Apart from the grouting material itself, the soft soil does not have a significant reinforcement effect. However, after the material of this invention enters the soft soil, through the penetration and water consumption of inorganic water-consuming powder and hydraulic cementitious composite materials, it can significantly reduce the moisture content of the soft soil and form a tree-like support structure in the soft soil, thus playing a significant reinforcement role.

[0061] The above are the embodiments listed in this example. However, this example is not limited to the optional embodiments described above. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can derive other various forms of embodiments based on the inspiration of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example. The scope of protection of this example should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A high permeability soft soil grouting reinforcement composite material, characterized in that: The water hardening composite material, the inorganic water consumption powder, the surfactant, the early strength surfactant, the organic water consumption material, the catalyst and water are mixed in the mass ratio of 80-120:0.4-1.4:0.1-1:0-0.5:1.3-1.6:0.05-0.1:20-40. The organic water consumption material comprises the following raw materials in the mass ratio: 0.6-0.8 parts of NCO-R, 0.4-0.8 parts of R-X·OH and 0.3-0.8 parts of (—R—O—R—). The NCO-R is one or more of toluene diisocyanate, isophorone diisocyanate, diphenyl methane diisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate or lysine diisocyanate. The R-X·OH is one or more of trimethylolpropane, neopentyl glycol, ethylene glycol or 1,3-butylene glycol; and the (—R—O—R—) is one or more of polyoxypropylene glycol, polytetrahydrofuran glycol or tetrahydrofuran-oxpropylene copolymer glycol.

2. The high-permeability soft soil grouting reinforcement composite material according to claim 1, characterized in that: The water hardening composite material has a fineness of 800 mesh or more.

3. The high permeability soft soil grouting reinforcement composite material according to claim 1, characterized in that: The inorganic water consumption powder is one or more of calcium oxide, calcium chloride, sodium sulfate and magnesium chloride.

4. The high permeability soft soil grouting reinforcement composite material according to claim 1, characterized in that: The catalyst is one or more of triethylamine, diethyl ethanolamine, N-methyl morpholine, N-ethyl morpholine, N-methyl pyrrolidine, dibutyl tin diacetate, dibutyl tin dilaurylate, dibutyl tin dioctoate or dioctyl tin diacetate.

5. The method for preparing a high-permeability soft soil grouting reinforcement composite material according to any one of claims 1-4, characterized in that: The water hardening composite material, the inorganic water consumption powder, the surfactant and the early strength surfactant are weighed, mixed and stirred by using a mortar mixer to uniformly mix the solid components, thereby obtaining material A; water is weighed and added into the uniformly mixed solid material at one time, and material B is obtained by stirring with the mortar mixer; the organic water consumption material is stirred to obtain material C; the material C is added into the solid composite material and uniformly mixed, and the catalyst is added and stirred for 30 seconds, thereby obtaining material D, which is the target material. The water hardening composite material, the inorganic water consumption powder, the surfactant, the early strength surfactant, the organic water consumption material, the catalyst and water are mixed in the mass ratio of 80-120:0.4-1.4:0.1-1:0-0.5:1.3-1.6:0.05-0.1:20-40. The organic water consumption material comprises the following raw materials in the mass ratio: 0.6-0.8 parts of NCO-R, 0.4-0.8 parts of R-X·OH and 0.3-0.8 parts of (—R—O—R—). The NCO-R is one or more of toluene diisocyanate, isophorone diisocyanate, diphenyl methane diisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate or lysine diisocyanate. The R-X·OH is one or more of trimethylolpropane, neopentyl glycol, ethylene glycol or 1,3-butylene glycol; and the (—R—O—R—) is one or more of polyoxypropylene glycol, polytetrahydrofuran glycol or tetrahydrofuran-oxpropylene copolymer glycol. The water hardening composite material has a fineness of 800 mesh or more. The inorganic water consumption powder is one or more of calcium oxide, calcium chloride, sodium sulfate and magnesium chloride. The catalyst is one or more of triethylamine, diethyl ethanolamine, N-methyl morpholine, N-ethyl morpholine, N-methyl pyrrolidine, dibutyl tin diacetate, dibutyl tin dilaurylate, dibutyl tin dioctoate or dioctyl tin diacetate. The water hardening composite material, the inorganic water consumption powder, the surfactant and the early strength surfactant are weighed, mixed and stirred by using a mortar mixer to uniformly mix the solid components, thereby obtaining material A; water is weighed and added into the uniformly mixed solid material at one time, and material B is obtained by stirring with the mortar mixer; the organic water consumption material is stirred to obtain material C; the material C is added into the solid composite material and uniformly mixed, and the catalyst is added and stirred for 30 seconds, thereby obtaining material D, which is the target material.

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